Clive Lewis

Lewis may no longer be in the shadow Cabinet, but he is respected by the left-wing of the party as an early backer of Jeremy Corbyn to be leader. So when he is critical of his party’s leadership on Brexit he holds sway.

He is an advocate of a second referendum on Britain’s membership of the EU and could put pressure on his party’s leadership to commit to freedom of movement post Brexit.

PARTY: Labour

POSITION: Former shadow business secretary, backbench MP

MP SINCE: 2015

REMAINIAC OR BREXTREMIST? Remain

Return to the full list of 40 Brexit troublemakers to discover who to watch as legislation disentangling Britain from the European Union goes through the U.K. parliament. For an explanation of how this list was compiled, see here.